The record is listed by the FAI as 244km/h (about 130 kts), but that is the average for the whole journey and pretty remarkable by any standard, more so for one that has stood for 68 years.
On paper, ther are quite a few aircraft that could do it, with 150+kts cruise and good endurance.
Even if I had the cash and resources to attempt it in, say, a Lancair 4P, it would feel like cheating to take the record away from Henshaw.